Auto-anchor attribute regexes, document _validTags
FIX: Use lang- prefixes for HLJS; add nohighlight for ...

text; use a proper whiteListTag() call.

Old posts are not affected - no global rebake is necessary.
Clean up validateAttribute() function

Remove code duplication
FEATURE: Allow explicit rel="nofollow" on links
Fix JSHint
Fix data-* behavior (failure to understand own docs)
Update Markdown tests
Add emoji pl_PL localization
Remove href attribute from tab link to prevent duplicate event on enter.

Because Discourse doesn't preventDefault on links with an href of "#"
this tab-able link was firing a click event when enter was pressed. This
had the unfortunate side effect of breaking the history, making routing
and navigation unreliable.
Add additional fields that indicate reply

When scanning for where a reply starts, three lines in a row matching common email reply headers indicate the start of a reply. Add 'Cc', 'Bcc', and 'Date' because these are also common.
Show dismiss posts/topics buttons on category filtered lists
Apply comments from eviltrout, using this.get('category.id'), and use snake case for category_id
trivial update to allow api endpoint for sync_sso
Merge pull request #2933 from techAPJ/patch-1

trivial update to allow api endpoint for sync_sso
Apply comment from @sam to consolidate logic
SECURITY: Don't allow redirects with periods in case you don't control
other tlds on the same domain.
UX: Add title to user card, if exists
long embed content urls overflow in safari?
FIX: Better page titles for SEO
Add /badges to robots.txt for now, we don't have a crawlable view so
it's better to exclude it.